they're pretty much all the same.

Thanks for the input. Given what I've seen here, you may just be perfectly right. You guys have been doing this a lot longer than me.
Even so, I'm hoping that at least one will bite. For example, that MeoKhan (from Pakistan) guy seems to be fairly legit. I haven't read all of his posts, but what I have seen seems to be tempered with reason and understanding. And then there is that other guy, Antarch from Nigeria, who has thrown some really weird stuff my way. I'd really like to know his story.
So, if you are an ESL writer from Nigeria who is taking on clients from native English speaking countries, then I wonder how many you need to do to make a comfortable living. If you live in Lagos, then the same cost of living is a bit more than what it is for me in Detroit. In Abuja, it a bit less. But this all hides the fact that about one half of the Nigerians live is relatively extreme poverty. So if you are used to living on less than a few dollars per day, then a couple of good clients per month could go a long way. Or maybe your doing a bunch of papers per month for less than 10 USD per page. At any rate, Wikipedia says that life expectancy is around 52 years, so you don't have the same retirement concerns as me, if at all. I don't know. Enlighten us.
And then what about Pakistan? I've never been there, but it seems completely different in every way from Nigeria. It also seems like a place of extremes from the super expensive Karachi to folks living simply in remote mountain villages. I've got a sense of some of the extreme differences between the haves and have nots from living in Detroit, but I don't think I have the slightest clue what it is like in Nigeria and Pakistan. And English is listed an official language in Pakistan - I was surprised to learn this.
Maybe there aren't many of us that do the calculations, but I have it figured to how much I have to make per hour, day, week, month, and year in order to make this profitable and worth my time. Since I am a fat American who consumes and wastes more than anyone else on the planet, I am guessing that my expenses are a lot more than a typical ESLer.
I guess that I am looking for a demographics lesson here.